Launtop MQ6638-FUZHOU User manual

Original Instructions 8204216
GASOLINE WATER PUMP FIGURE
SKU
8204216
Model
MQ6638-FUZHOU
GASOLINE HIGH PRESSURE PUMP FIGURE
Fuzhou Launtop M&E Co., Ltd.

Original Instructions 8204216
No. 56, Jinshan Road, Jinshan Industrial Park, Fuzhou, China

Original Instructions 8204216
INTRODUCTION
Thank you for purchasing the products of our company.
Our company’s Gasoline Water (High Pressure)Pump applies the high quality self-priming
pump.
The engine is air-cooled, direct injection, 4-stroke, gasoline engine or air-cooled, single
cylinder,4-stroke gasoline engine. It possesses many good features such as: small in dimensions, light
weight, simple structure, convenient to use etc. It is an ideal tool of irrigation and drainage.
Our company’s Water (High Pressure)Pump series widely serve agriculture field, industrial and
fire fighting, construction, fishery, garden etc.
The operation manual tells you how to operate and maintain your new Water(High
pressure)Pump. Please read it before use to ensure the proper handling and operation. Follow the
introduction carefully to keep your machine in the best running condition, which is helpful to prolong
the lift span of the Water (High pressure) Pump.
With the improvement of our products, the descriptions of this manual may differ from practical
products. So user should pay attention to it.

Original Instructions 8204216

Original Instructions 8204216
CONTENTS
Gasoline Water Pump Overall Figure……………………………(1)
Gasoline High Pressure Pump Overall Figure……………………(1)
CHAPTER 1 MAIN TECHNICALSPECIFICATIONSAND PARAMETER
1. Gasoline Water Pump specifications and parameter …………….(3)
2. Gasoline High Pressure Pump specifications and parameter…….(4)
3. Model Name Identification…………………………………….(5)
CHAPTER 2 MAIN STRUCTUREAND USE
1. Main Structure………………………………………………….(6)
2. Main points of use…………………………………………….. (6)
3. Procedure of use………………………………………………..(6)
4. Caution…………………………………………………………..(7)
5. Use and maintenance……………………………………………(7)
6. Installation of connective soft pipe………………………………(9)
CHAPTER 3ANALYSIS OF MALFUNCTION AND REMEDY….(10)
CHAPTER 4 SPARE PARTS LIST
1. Part list of 1.5 inch(F40-2) two impeller high pressure pump……(12)
2. Part list of 1.5 inch（F40）high Pressure Pump……………………………(14)
3. Part list of 2 inch(F50) high pressure pump…………………………………..(15)
4. Parts list of 2 inch(P50) self-priming pump…………………………….....（16）
5. Parts list of 3 inch(P80) self-priming pump…………………………………（17）
6. Parts list of 4 inch(P100) self-priming pump………………………………（18）

Original Instructions 8204216
CHAPTER 1 MAIN TECHNICAL SPECIFICATIONS AND PARAMETER
1. Gasoline Water Pump specifications and parameter
Self-priming water pump
TYPE
P50C
P80C
P100C
Suction port
dia(mm)
50(2inch)
80(3inch)
100(4inch)
Rated displacement
(m³/h)
21
36
85
max.head(m)
26
25
25
Rated head (m)
18
17
23
Self-priming
time(s/4m)
70
120
180
max.suction head
(m)
8
8
8
Engine
Model
160P
160P
240P
Rated power(kw/rpm)
2.76/3000
2.76/3000
4.9/3000
Displacement(CC)
163
163
242
Fuel tank
capaity(L)
3.6
3.6
6.0
Unit
G.W.(kg)
24
25
41.7
Outline dimensions
(L×W×H)(mm)
495X395X405
545X405X455
635X505X570
2. Gasoline High Pressure Pump specifications and parameter
Model:
LTP50C, LTP80C, LTP100C, LTF40C, LTF40C-2,
LTF50C
Measure sound pressure level:
86,06dB (A)
Guaranted sound power level:
105dB(A)
Uncertainty K
3,0dB(A)

Original Instructions 8204216
(1) Gasoline Water Pump
50 C
Economic
Pump suction port dia(mm)
(2) Gasoline High Pressure Pump
40 C
Economic
Pump suction port dia(mm)
High
TYPE
F40C(L)
F40C(L)-2
F50C(L)
Suction port dia(mm)
40
40
50
Discharge port dia(mm)
25x2;40x1
50x1
Capacity(m³/hr)
17(at 35 m Head)
12(at50 m Head)
23(at 30m Head)
Max.head(m)
55
95
55
Rated head (m)
52
90
47
Self-priming
time(S/4m)
30
30
30
Max.suction head(m)
6.0
6.0
6.0
Engine
Model
200P
Rated power(kw)
3.7
4
Displacement(cc)
196
0.296
Fuel tank capacity(1)
3.6
Unit
Gross weight(kg)
23
24.2
26.5
Outline dimension
(LxWxH)(mm)
560x460x565(L:560x475x680)

Original Instructions 8204216
CHAPTER 2 MAIN STRUCTUREAND USE
1. Main Structure.
Water Pump and High Pressure Pump consists of Gasoline engine and pump kit. The pump is
fixed on a frame with shock absorbers.
The self-priming pump consists of pump body, pump cover, flow guidance, impeller and seals,
etc. Shaft sealing is machinery type sealing and the inlet of pump is higher than the inlet of impeller so
that is can self prime and you only need to fill water into the body of the pump. The inlet of pump is
fixed with a one-way valve to prevent liquid from being drained into water pool from the pump body
by siphon after stopping the machine. It must guarantee store enough liquid in the pump body for next
start.
The self-priming pump’s flow guidance and impeller are made from high strength cast iron, high
pressure pump’s flow guidance and impeller are made from high quality die casting of aluminum alloy.
To meet different use, high-pressure pump can equip with different accessories.
2. Main point of use
(1) The coupling of suction pipe to the pump must be tight, reliable without any leakage.
(2) A filter net must be added into the inlet of suction pipe as a protection to avoid impurity be
sucked into the pump and stick or damage the impeller.
(3) Prime the pump until the water overflow.
(4) Do not run it at high speed unless you prime it.
(5) Drain off the pump lor storage
3. Procedure of use
(1)Adding water
When start the pump for the first time, it only need to add a few water into the pump body. Please see
Fig1

Original Instructions 8204216
(2)Start the engine
Please refer to manual of engine.
4. Caution
(1) The fuel of the pump is Gasoline fuel , not allow mixing of them. Keep fire and other explosives
and inflammables away from the pump. Operate the pump on a level surface to prevent fuel spilling.
(2) Keep the fuel clean. The fuel must be filtered or settled for 24 hours before used. Do not add fuel
into fuel tank or crank case when the machine is running.
(3) Exhaust gas contains poisonous carbon monoxide. Never use the machine in poorly ventilated
locations, so that people and cattle will not be affected.
(4) Do not touch muffler and muffler cover while the macine is running or hot.
(5) Run new or newly maintained machine at low speed with low load for the first 20 hours of test
period. Do not run it at high speed with full load.
5. Use and Maintenance
(1) Theoretically, air pressure and the suction head of pump will decrease with the altitude increasing.
The value of decrease can be estimated by minus local atmosohere value from 10m(metre water
column).
(2) Short and straight pipe is preferred as it can reduce unnecessary loss of pipeline. The pipeline must
be supported to avoid from vibrating and damaging the pump by oppressive. Before operation you
must check connection part between pump and pipeline whether there is loose phenomenon and pay
special attention to leakage of inlet pipeline.
(3) The filter net must keep a certain distance between river surface, river bottom and river bank ,the
net must dip into water not less than 0.3m to avoid suction air and to keep a distance which is not less
than 1.2m from river bottom, river bank to avoid suction stone or weeds.
(4) When the pump is used in winter , to screw off the drain cock under the pump and draw off water
thoroughly after stopping the machine to prevent from being broken by ice of freeze.
(5) If the gap between impeller and the surface of flow guidance is over 1mm, so that it can be
continuous to be used after adding an adjustment shim on the shaft shoulder.
(6) When change self-priming pumps machinery seal, be sure to apply adhesive to the connection

Original Instructions 8204216
between steel part “#7”and pump cover. When fixed it, do not hit by force to prevent wear slice
fracture. Please see fig2.
Fig 2 stucture diagram of machinery seal
1. seal ring 2.ceramics moving ring 3. graphite static ring 4.corrugated pipe 5.washer 6.spring 7.steel
part
(7) According to High Presure Pump, the clearance between impeller and regulator is 1mm, when
remove or install, can adjust the clearance through adding or reduce the gasket in long shaft screw.
(8) When change machinery seal, silent ring set (NO.7、8)install in the pump cover, movable ring
set(NO.1-6)install in the diesel output shaft. Do not knock heavily when installing to prevent breaking
the grind piece. See Fig3
Fig 3 seal ring
1. graphite moving ring 2.seal ring 3.spring shim 4.compressde spring
5.moving ring seal 6.bottom seat 7.ceramics static ring 8.assistant seal
6. Installation of connective soft pipe
Set the rubber soft pipe on the connector of inlet pipe. Pay attention to, it must be seted over the thread,
and then tighten it with clipper joint.

Original Instructions 8204216
CHAPTER 3ANALYSIS OF MALFUNCTION AND REMEDY
Malfunction
Cause
Remedy
The pump can not do pumping
Fill water is not enough
Refill water into the pump
Inlet pipe leakage
Check inlet pipe and connector of pipe
change Pipe or tighten the screw
Speed of pump is too low
Check speed and find cause for remedy
The filter net is obstructed
Check the position of installation
It is over the capacity of
pump
Check the position of installation
The seal was abrased and air
leak
Change the machinery seal set
The flow of water is not enough
The filter net, pipeline or
impeller is Choked
Clean up the obstruction
Speed is low
Increase speed
Impeller of seal is wore
seriously
Adjust the gap or change impeller and
machinery seal
Inlet pipe leakage
Check inlet pipe and connector of pipe,
change the pipe or screw down the bolt
Impeller damage and leakage
seriously
Change impeller into a new one
Total head is too high
There is air in the pump or
inlet, air leak into the seal
Check the reason, adjust it
Screw off air drain screw cock, and
eliminate the air. Check the pipeline or
change machinery seal
Speed of engine is not
stability
Adjust the speed of engine

Original Instructions 8204216
Malfunction
Cause
Remedy
Power consumption of pump is too large
There is a rub between impeller
and flow guidance
Listen to the sound carefully,
whether the impeller is clashed
with the case and then to adjust
The impeller is obstructed by
weeds or eyewinker.
Check and clean up
No flow suddenly
The connector of inlet pipe is
loosed or leakage
Check inlet pipeline and remedy
Suction bead is too high and
cause cavitations
Check suction head and lower the
position of pump
Cause vibration or noise
Suction head is too high and
cause cavitations
Check suction head and lower the
position of pump
Output of water is too large
Decrease the output of water
Inlet pipe is obstructed by foreign
body so the resistance is too large
Check inlet pipe and filter net to
clean up
Rotary part is loosed
Listen carefully and inspect the
part which cause the noise and
stop the machine to adjust
Installing for pump unit is not
stability
Stop the machine for checking and
adjusting
There is air lay up in the pump or
pipeline
Screw off air drain screw cock and
expel the air

Original Instructions 8204216
Impeller damage
Stop the machine for checking and
change the impeller with a new
one

Original Instructions 8204216

Original Instructions 8204216

Original Instructions 8204216

Original Instructions 8204216

Original Instructions 8204216

Original Instructions 8204216

Original Instructions 8204216